{"id":480,"date":"2026-09-29T13:05:02","date_gmt":"2026-09-29T13:05:02","guid":{"rendered":"https:\/\/www.auriga.polimi.it\/index.php\/lab\/coalescence-cell\/"},"modified":"2026-10-05T09:39:30","modified_gmt":"2026-10-05T09:39:30","slug":"coalescence-cell","status":"publish","type":"page","link":"https:\/\/www.auriga.polimi.it\/index.php\/lab\/coalescence-cell\/","title":{"rendered":"Coalescence cell"},"content":{"rendered":"\n<p class=\"is-style-eyebrow wp-block-paragraph\">Small scale \u00b7 Work package b and c<\/p>\n\n\n\n<div class=\"wp-block-group facility-split\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group facility-pics\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<figure class=\"wp-block-video\"><video height=\"218\" style=\"aspect-ratio: 200 \/ 218;\" width=\"200\" autoplay loop muted playsinline poster=\"https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/coalescence-event-poster.jpg\" src=\"https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/coalescence-event.mp4\" aria-label=\"High-speed video of two bubbles coalescing between the capillary tips\"><\/video><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"985\" src=\"https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/coalescence-rig-photo-1024x985.jpg\" alt=\"The coalescence rig: backlit rectangular cell with two opposed capillaries, and the syringe pump beside it\" class=\"wp-image-496\" srcset=\"https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/coalescence-rig-photo-1024x985.jpg 1024w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/coalescence-rig-photo-300x289.jpg 300w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/coalescence-rig-photo-768x739.jpg 768w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/coalescence-rig-photo-1536x1477.jpg 1536w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/coalescence-rig-photo.jpg 1600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group facility-text\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"is-style-lede wp-block-paragraph\">The facility is dedicated to studying how bubbles interact and merge, a key phenomenon in many industrial gas\u2013liquid processes. It features a transparent rectangular cell where two opposed capillaries generate pairs of bubbles under controlled conditions. By adjusting capillary size, spacing, and gas flow rate, the setup can reproduce a wide range of interaction scenarios.<\/p>\n\n\n\n<p class=\"is-style-prose wp-block-paragraph\">A high-speed camera (up to 6000 fps) and a backlit optical system capture the fast dynamics of the bubbles as they approach, touch, bounce, or coalesce. Advanced image-analysis routines then identify each event and measure quantities such as coalescence percentage, approach velocity, and coalescence time.<\/p>\n\n\n\n<p class=\"is-style-prose wp-block-paragraph\">As part of the AURIGA project, the facility is used to characterize ionic-liquid mixtures, enabling controlled experiments that reveal how these fluids influence bubble interactions and coalescence behaviour.<\/p>\n\n\n\n<p class=\"is-style-prose wp-block-paragraph\">This environment provides accurate, reproducible measurements and supports both fundamental research and the development of reliable models for gas\u2013liquid systems.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<p class=\"is-style-eyebrow facility-figures-label wp-block-paragraph\">Measurement set-up<\/p>\n\n\n\n<div class=\"wp-block-group facility-figures\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<figure class=\"wp-block-image size-large fig-scheme\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"563\" src=\"https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/coalescence-rig-scheme-1024x563.png\" alt=\"Scheme of the coalescence rig: syringe pump feeding two opposed capillaries in the cell, LED backlight panel and high-speed camera connected to a computer\" class=\"wp-image-497\" srcset=\"https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/coalescence-rig-scheme-1024x563.png 1024w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/coalescence-rig-scheme-300x165.png 300w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/coalescence-rig-scheme-768x422.png 768w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/coalescence-rig-scheme-1536x844.png 1536w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/coalescence-rig-scheme.png 1717w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full fig-cad\"><img loading=\"lazy\" decoding=\"async\" width=\"401\" height=\"590\" src=\"https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/rig-coalescence.png\" alt=\"CAD view of the coalescence cell\" class=\"wp-image-345\" srcset=\"https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/rig-coalescence.png 401w, https:\/\/www.auriga.polimi.it\/wp-content\/uploads\/2026\/09\/rig-coalescence-204x300.png 204w\" sizes=\"auto, (max-width: 401px) 100vw, 401px\" \/><\/figure>\n<\/div><\/div>\n\n\n<nav class=\"facility-nav\" aria-label=\"Other facilities\"><p class=\"is-style-eyebrow\">Other facilities<\/p><ul><li><a href=\"https:\/\/www.auriga.polimi.it\/?page_id=477\">Single-bubble column<\/a><\/li><li><a href=\"https:\/\/www.auriga.polimi.it\/?page_id=478\">Bubble-swarm column<\/a><\/li><li><a href=\"https:\/\/www.auriga.polimi.it\/?page_id=479\">Circular bubble-swarm column<\/a><\/li><li><a href=\"https:\/\/www.auriga.polimi.it\/?page_id=481\">CFD-grade column<\/a><\/li><li><a href=\"https:\/\/www.auriga.polimi.it\/?page_id=482\">Mass-transfer column<\/a><\/li><li><a href=\"https:\/\/www.auriga.polimi.it\/?page_id=499\">Large-diameter bubble column<\/a><\/li><\/ul><\/nav>\n\n\n\n<p class=\"is-style-back wp-block-paragraph\"><a href=\"https:\/\/www.auriga.polimi.it\/?page_id=13\">\u2190 Back to Lab<\/a><\/p>\n\n","protected":false},"excerpt":{"rendered":"<p>Small scale \u00b7 Work package b and c The facility is dedicated to studying how bubbles interact and merge, a key phenomenon in many industrial gas\u2013liquid processes. It features a transparent rectangular cell where two opposed capillaries generate pairs of bubbles under controlled conditions. By adjusting capillary size, spacing, and gas flow rate, the setup [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"parent":13,"menu_order":4,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"class_list":["post-480","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/pages\/480","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/comments?post=480"}],"version-history":[{"count":0,"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/pages\/480\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/pages\/13"}],"wp:attachment":[{"href":"https:\/\/www.auriga.polimi.it\/index.php\/wp-json\/wp\/v2\/media?parent=480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}